US3685734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled fragrance release device
Assignee: 3M Co
•
Filing: 1971-02-19
•
Granted: 1972-08-22
•
Expires: 1991-02-19
Abstract
Abstract A smooth-surfaced layer of soft vinyl plastisol containing a fragrance or other volatile organic substance is coated on a base and protectively covered with a smooth flexible sheet having low vapor transmission. The assembly is ordinarily substantially odor-free, but when the cover sheet is removed, the fragrance is immediately detectable and is gradually released. Replacing the cover sheet, which displays almost molecular adhesion for the smooth exposed surfaces of the plastisol, immediately stops the release of the fragrance.
Inventors
- 👤 Walter J Paciorek
- 👤 Randolph Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:32
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/042; A61L9/12; B32B27/18; B32B27/22; B32B27/30; B32B27/304; Y; Y10; Y10S; Y10S428/00; Y10S428/905; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/298; Y10T428/31504; Y10T428/31786; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
12 words
The structure of claim 1 wherein the composition contains a viscosity-increasing agent.
Claim 2
Dependent Claim
140 words
a visually homogeneous layer bonded to one face of said base, said layer having a. a composition consisting essentially of a blend of i. 20 to 80 parts by weight of plastisol grade vinyl resin selected from the class consisting of vinyl chloride homopolymer and vinyl chloride:vinyl acetate copolymer, ii. 80 to 20 parts by weight of plasticizer for said vinyl resin, said plasticizer boiling at a temperature above the fusion temperature of said vinyl resin, and iii. an effective amount of volatile organic substance, said substance being compatible with and not reactive with said plasticizer, b. a thickness of about 1/4 to 50 mils, c. the surface distal to said base characterized by smoothness and ability to wet and adhere to smooth surfaces, and d. no tendency to attack either said base or the hereinafter mentioned cover sheet, and
Claim 3
Dependent Claim
32 words
introducing said dispersion between two smooth sheets, each of which has a low ethyl acetate vapor transmission rate, the dispersion-contacting surface of the two sheets differing in their affinity for said dispersion,
Claim 4
Dependent Claim
26 words
subjecting the exposed faces of said sheets to pressure to reduce the dispersion to a layer having a thickness no greater than about 25 mils, and
Claim 5
Dependent Claim
94 words
a flexible continuous smooth cover sheet ply having an ethyl acetate vapor transmission rate of less than 0.5 gram per 100 square inches per 24 hours at 40* C. and 50 percent relative humidity covering said layer and wetted thereby so as to be lightly adhered thereto but capable of repeated removal and replacement without damaging said layer, whereby said volatile substance is retained by said structure for extended periods of time, becomes immediately available and gradually released when said cover sheet is removed, and is again retained when said cover sheet is replaced.
Claim 6
Dependent Claim
12 words
The structure of claim 2 wherein the viscosity-increasing agent is fumed silica.
Claim 7
Dependent Claim
21 words
The structure of claim 2 wherein the layer-contacting face of the base is primed to enhance its receptivity to vinyl plastisols.
Claim 8
Dependent Claim
16 words
heating the resultant structure to a temperature and for a time sufficient to fuse said dispersion.
Claim 9
Dependent Claim
26 words
The structure of claim 1 wherein the base and the cover sheet are adhered to opposing pages in a leaved folder, booklet, magazine or the like.
Claim 10
Dependent Claim
15 words
The structure of claim 1 wherein the base is a biaxially oriented polyethylene terephthalate film.
Claim 11
Dependent Claim
26 words
The structure of claim 1 wherein the layer-contacting surface of the cover sheet is provided with a release agent to decrease its receptivity to vinyl plastisols.
Claim 12
Dependent Claim
53 words
The structure of claim 1 wherein the base and the cover sheet are both flexible biaxially oriented polyethylene terephthalate films, the layer-contacting surface of the base sheet being treated to increase its receptivity to vinyl plastisols and the layer-contacting surface of the cover sheet being treated to decrease its receptivity to vinyl plastisols.
Claim 13
Dependent Claim
31 words
The structure of claim 8 wherein the base sheet and the cover sheet are the same film, said product being wound convolutely upon itself in roll form to expose said film.
Claim 14
Dependent Claim
21 words
The structure of claim 8 wherein at least one exposed surface of said polyethylene terephthalate film is provided with an adhesive.
Claim 15
Dependent Claim
12 words
The structure of claim 10 wherein the volatile substance is a fragrance.
Claim 16
Dependent Claim
15 words
A method of making a structure in accordance with claim 1 comprising the steps of
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |